Deploy the mistral helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy the Mistral Helm chart on Google Kubernetes Engine (GKE) you will perform the following steps:

1. **Set up a GKE cluster**: This is the Kubernetes cluster on which your Helm chart will be deployed. We will create a basic GKE cluster with default configurations using Pulumi's GCP provider.

2. **Install and Configure Helm**: Helm is a package manager for Kubernetes that allows you to define, install, and upgrade Kubernetes applications. After setting up the GKE cluster, you'll need to ensure `helm` is installed on your local machine or CI/CD environment to work with Pulumi.

3. **Deploy the Helm Chart**: With the cluster in place and Helm set up, we’ll deploy the Mistral Helm chart to the GKE cluster. Helm charts are deployed using the Pulumi Kubernetes provider.

Below is a Pulumi TypeScript program that creates a GKE cluster and deploys the Mistral Helm chart.

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as gcp from "@pulumi/gcp";
import * as k8s from "@pulumi/kubernetes";

// Create a GKE cluster
const cluster = new gcp.container.Cluster("my-gke-cluster", {
    initialNodeCount: 2,
    nodeVersion: "latest",
    minMasterVersion: "latest",
    nodeConfig: {
        machineType: "n1-standard-1",
        oauthScopes: [
            "https://www.googleapis.com/auth/compute",
            "https://www.googleapis.com/auth/devstorage.read_only",
            "https://www.googleapis.com/auth/logging.write",
            "https://www.googleapis.com/auth/monitoring"
        ],
    },
});

// Export the Cluster name
export const clusterName = cluster.name;

// Export the Kubeconfig to access the cluster
export const kubeconfig = pulumi.
    all([cluster.name, cluster.endpoint, cluster.masterAuth]).
    apply(([name, endpoint, masterAuth]) => {
        const context = `${gcp.config.project}_${gcp.config.zone}_${name}`;
        return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${masterAuth.clusterCaCertificate}
    server: https://${endpoint}
  name: ${context}
contexts:
- context:
    cluster: ${context}
    user: ${context}
  name: ${context}
current-context: ${context}
kind: Config
preferences: {}
users:
- name: ${context}
  user:
    auth-provider:
      config:
        access-token: ${masterAuth.token}
        cmd-args: config config-helper --format=json
        cmd-path: gcloud
        expiry-key: '{.credential.token_expiry}'
        token-key: '{.credential.access_token}'
      name: gcp
`;
    });

// Initialize a new K8s provider, using the kubeconfig to interact with the GKE cluster
const k8sProvider = new k8s.Provider("gkeK8s", {
    kubeconfig: kubeconfig,
});

// Deploy the Mistral Helm chart
const mistralChart = new k8s.helm.v3.Chart("mistral-chart", {
    chart: "mistral",
    // You may need to add a repository or specify the chart source if it's not available in the default repos
    fetchOpts: {
        repo: "https://charts.example.com/",
    },
}, { provider: k8sProvider });

// Export Helm chart deployment status
export const mistralChartStatus = mistralChart.status;
```

In this program, we have:

- Defined a `gcp.container.Cluster` resource to create the cluster. We chose the `n1-standard-1` machine type for the nodes in the cluster and selected appropriate OAuth scopes needed.
  
- Created a `kubeconfig` to interact with the newly created cluster. This `kubeconfig` is generated using the Pulumi `apply` method to securely use the cluster's endpoint and master authentication details.

- Initialized a Kubernetes provider that employs the generated `kubeconfig` to interact with the GKE cluster.

- Deployed the Mistral Helm chart using `k8s.helm.v3.Chart`. We specified the chart name and optionally you need to provide the repository URL where the chart is located. Replace `https://charts.example.com/` with the actual URL for your Mistral Helm chart.

Remember to replace `https://charts.example.com/` with the actual repository URL where your Mistral Helm chart is hosted. If the chart is hosted on a private repository, you may need to add authentication fields to the `fetchOpts`.

Make sure your Pulumi CLI is installed and configured for GCP, and Helm is installed on your machine to run this program successfully. After running `pulumi up`, this Pulumi program will provision a new GKE cluster and deploy the specified Helm chart onto it.